The RT0402BRE0749K9L with Thin Film Resistors - SMD 49.9K OHM .1% 50PPM 1/16W is an electronic component manufactured by Yageo. It is a thin-film resistor in a 0402 package, with a resistance of 49.9K Ohms, a tolerance of 0.1%, a temperature coefficient of 50ppm, and a power rating of 1/16 watts. It is a robust SMD component which has excellent long-term stability and temperature performance. It is used in many applications, such as for impedance matching, circuit protection, signal filtering, and circuitry tuning.